Vulnerability in Openclaw Matrix
CVE-2026-100541
OpenClaw's Matrix integration (npm package @openclaw/matrix) versions >= 2026.2.2 and < 2026.8.1 lowercase complete Matrix user IDs — including historical localparts and the case-sensitive server-name portion — when deriving the OpenClaw authorization identity. As a result, distinct authenticated Matrix accounts can normalize to the same authorization identity. A Matrix participant controlling a colliding account identifier (a protocol-valid identifier that differs from the configured one only by characters OpenClaw case/Unicode folds; display-name matching is not required) can inherit allowlist, owner-command, exec-approval, or plugin-approval authority configured for another account. The issue is fixed in 2026.8.1.
Published .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/openclaw/openclaw/security/advisories/GHSA-hgv5-f2r3-6v9r (vendor-advisory)
- www.vulncheck.com/advisories/openclaw-matrix-before-2026.8.1-authorization-bypa… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-100541?
- CVE-2026-100541 is a high-severity vulnerability in Openclaw Matrix, classified under Improper Handling of Case Sensitivity. CVSS score: 7.5/10. Published 2026-09-26.
- How severe is CVE-2026-100541?
- High severity. CVSS v3 base score is 7.5 out of 10.